import java.util.Random;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User:DELL
 * Date:2025-04-09
 * Time:23:52
 */
public class Test3 {
    public int[] sortArray(int[] nums) {
        qsort(nums,0,nums.length-1);
        return nums;
    }
    public void qsort(int[] nums,int l,int r){
        if(l>=r){
            return;
        }
        //数组分三块
        int key=nums[new Random().nextInt(r-l+1)+l];
        int left=l-1,right=r+1,i=l;//
        while(i<right){
            if(nums[i]<key){
                swap(nums,++left,i++);
            }else if(nums[i]==key){
                i++;
            }else{
                swap(nums,--right,i);
            }
        }
        //[l,left] [left+1,right-1] [right,r]
        qsort(nums,l,left);
        qsort(nums,right,r);
    }
    public void swap(int[] nums,int i,int j){
        int tmp=nums[i];
        nums[i]=nums[j];
        nums[j]=tmp;//
    }
}
